Effects of ultraviolet photon irradiation on the dielectric properties of biodegradable polymers

Yuya Yamaguchi, Nao Uchibori, Yoshimichi Ohki

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Three kinds of biodegradable polymers, poly-L-lactic acid (PLLA), polybutylene succinate (PBS), and polybutylene succinate adipate (PBSA), and low-density polyethylene (LDPE) as a reference were irradiated for 30 minutes by ultraviolet (UV) photons from a KrCl excimer lamp. It has become clear that the three biodegradable polymers are far more susceptible to UV photons than LDPE since they absorb UV photons very intensely in the vicinity of the irradiated surface. Space charge distribution profiles show that charge carriers are trapped near the irradiated surface. The conduction current increases by the UV-irradiation in all the biodegradable polymers. Instrumental analyses show that the samples were decomposed by photoinduced oxidation. Furthermore, the absorption spectra indicate the appearance of conjugated double bonds. Such structural changes induced seem to be responsible for the higher conductivity and the charge trapping.

    Original languageEnglish
    JournalIEEJ Transactions on Fundamentals and Materials
    Volume127
    Issue number2
    Publication statusPublished - 2007

    Fingerprint

    Biodegradable polymers
    Dielectric properties
    Photons
    Irradiation
    Low density polyethylenes
    Charge trapping
    Charge distribution
    Lactic acid
    Charge carriers
    Electric lamps
    Electric space charge
    Absorption spectra
    Oxidation

    Keywords

    • Biodegradable polymer
    • Photodegradation
    • Poly-L-lactic acid
    • Polybutylene succinate
    • Polybutylene succinate adipate

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Effects of ultraviolet photon irradiation on the dielectric properties of biodegradable polymers. / Yamaguchi, Yuya; Uchibori, Nao; Ohki, Yoshimichi.

    In: IEEJ Transactions on Fundamentals and Materials, Vol. 127, No. 2, 2007.

    Research output: Contribution to journalArticle

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